US6798385B2 - Wireless information consumer electronic apparatus - Google Patents
Wireless information consumer electronic apparatus Download PDFInfo
- Publication number
- US6798385B2 US6798385B2 US10/220,414 US22041402A US6798385B2 US 6798385 B2 US6798385 B2 US 6798385B2 US 22041402 A US22041402 A US 22041402A US 6798385 B2 US6798385 B2 US 6798385B2
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- United States
- Prior art keywords
- metal casing
- radio frequency
- antenna
- current
- consumer electronics
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
- H01Q1/2275—Supports; Mounting means by structural association with other equipment or articles used with computer equipment associated to expansion card or bus, e.g. in PCMCIA, PC cards, Wireless USB
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
Definitions
- the present invention relates to a consumer electronics apparatus for transmitting information by wireless means, and more particularly to an apparatus using a metal casing as an antenna.
- FIG. 13 and FIG. 14 A conventional example of wireless information consumer electronics apparatus is shown in FIG. 13 and FIG. 14 .
- an antenna 301 was used as an independent component.
- the antenna 301 was usually installed, for example, on the back side 302 of the apparatus or top 304 of the metal casing 303 , because it must be installed in a place accessible to the space and not interfering the handling operation of the wireless information consumer electronics apparatus.
- the radiation directivity characteristic of the antenna is as shown directions 305 , 306 , and 307 in FIG. 14 . Then the sensitivity is insufficient and the communication distance is short in the direction of 308 . Consequently the position of installation of the apparatus is limited.
- the metal casing of each set-top box may impair the antenna characteristic of other set-top box, and the communication area is limited, or the communication distance is shortened.
- the wireless information consumer electronics apparatus of the invention comprises:
- a metal casing used as an antenna the metal casing being in a shape to resonate at the frequency being used
- a radio frequency module having a current feeding terminal for transmitting radio frequency signal or receiving radio frequency signal mounted on the outer surface of the casing
- the wireless information consumer electronics apparatus in other aspect of the invention comprises:
- a metal casing used as an antenna the metal casing being in a shape to resonate at the frequency being used
- the wireless information consumer electronics apparatus in a different aspect of the invention comprises:
- a metal casing used as an antenna the metal casing being in a shape to resonate at the frequency being used
- the wireless information consumer electronics apparatus in another aspect of the invention comprises:
- the wireless information consumer electronics apparatus of the invention further comprises means for generating the plural excitation modes by selecting two or more grounding wires out of at least three or more grounding wires.
- the wireless information consumer electronics apparatus of the invention further comprises means for generating the plural excitation modes by using plural resonance modes of the excitation patch.
- the wireless information consumer electronics apparatus in a further aspect of the invention comprises:
- an antenna automatic matching device for automatically detecting presence or absence of metal in the surroundings, or metal approaching state by monitoring the matching state of the antenna, and matching the antenna by varying the impedance of an antenna matching element automatically by a detection signal of the matching state.
- a varactor diode is used as the antenna matching element.
- a ferrodielectric capacitor is used as the antenna matching element.
- an independent component as antenna is not used, so that a wireless information consumer electronics apparatus not limited in the mounting position of antenna is realized.
- a wireless information consumer electronics apparatus less limited in the place of installation of the apparatus is realized.
- the wireless information consumer electronics apparatus is less limited in the communication area and the communication distance is less shortened.
- FIG. 1 is a perspective view of a wireless information consumer electronics apparatus such as a set-top box in embodiment 1 of the invention.
- FIG. 2 is a sectional view showing flow of radio frequency current on the casing outer surface in embodiment 1 of the invention.
- FIG. 3 is a perspective view showing the direction of casing outer surface current and polarization and directivity characteristic when feeding current as shown in FIG. 1 at the central position of the casing and the casing size is 3 ⁇ /4 in width, 3 ⁇ /4 in depth, and ⁇ /4 in height.
- FIG. 4 is a lateral sectional view showing the casing outer surface current and directivity characteristic when feeding current at the casing end position in the same casing size as in FIG. 3 .
- FIG. 5 is a perspective view of a wireless information consumer electronics apparatus such as a set-top box in embodiment 2 of the invention.
- FIG. 6 is a perspective view of a wireless information consumer electronics apparatus such as a set-top box in embodiment 3 of the invention.
- FIG. 7 is a sectional view showing flow of radio frequency current on the casing outer surface in embodiment 3.
- FIG. 8 is a perspective view of a wireless information consumer electronics apparatus such as a set-top box in embodiment 4 of the invention.
- FIG. 9 is a sectional view showing flow of radio frequency current on the casing outer surface in embodiment 4.
- FIG. 10 is a block diagram of a wireless information consumer electronics apparatus in embodiment 5 of the invention.
- FIG. 11 is a diagram showing a matching method of antenna of the wireless information consumer electronics apparatus in embodiment 5 of the invention.
- FIGS. 12A, B are circuit diagrams showing configuration of matching element of the wireless information consumer electronics apparatus in embodiment 5 of the invention.
- FIG. 12C is a diagram showing reactance characteristic of matching element of the wireless information consumer electronics apparatus in embodiment 5 of the invention.
- FIG. 13 is a diagram showing a conventional wireless information consumer electronics apparatus.
- FIG. 14 is a diagram showing antenna directivity characteristic of the conventional wireless information consumer electronics apparatus.
- Embodiment 1 of the invention is described in detail below while referring to FIG. 1 to FIG. 4 .
- FIG. 1 is a perspective view of a wireless information consumer electronics apparatus such as a set-top box in embodiment 1 of the invention
- FIG. 2 is a sectional view showing flow of radio frequency current on the casing outer surface in embodiment 1 of the invention.
- FIG. 3 is a perspective view showing the direction of casing outer surface current and polarization and directivity characteristic when feeding current as shown in FIG. 1 at the central position of the casing when the casing size is 3 ⁇ /4 in width, 3 ⁇ /4 in depth, and ⁇ /4 in height.
- FIG. 4 is a lateral sectional view showing the casing outer surface current and directivity characteristic when feeding current at the casing end position in the same casing size as in FIG. 3 .
- a wireless information consumer electronics apparatus 100 a such as a set-top box has a metal casing 101 a .
- the metal casing 101 a has a shape to resonate at the frequency being used, and is designed to be used as an antenna.
- a radio frequency module 102 is installed in the center of the top of the metal casing 101 a , with its current feeding terminals 103 fitted into two screw holes 105 of the metal casing 101 a by means of current feeding and mounting screws 104 .
- the current feeding terminals 103 and metal casing 101 a are electrically connected, and further the radio frequency module 102 is mechanically coupled to the metal casing 101 a by means of the current feeding and mounting screws 104 . This is also called the current feeding coupling means in the claims.
- a signal source 106 is mounted on the radio frequency module 102 , and a radio frequency current is applied from the current feeding terminals 103 to the metal casing 101 a.
- a slit 107 a is opened between the two screw holes 105 so as to separate the two screw holes.
- This slit 107 a is provided in the case that the distance between the current feeding terminals 103 is close to a distance electrically short-circuited in comparison with the wavelength of the radio frequency current and then the antenna radiation efficiency is not enough.
- the radio frequency signal when a radio frequency signal is emitted as electromagnetic wave, the radio frequency signal is generated in the signal source 106 on the radio frequency module 102 .
- the generated radio frequency signal flows as current on the outer surface of the metal casing 101 a , through the current feeding and mounting screws 104 , from the current feeding terminals 103 on the radio frequency module 102 .
- FIG. 1B the position of screw holes 105 are changed so as to vary the direction of the straight line linking the two current feed terminals 103 by 90 degrees when mounting the radio frequency module 102 on a metal casing 101 b , as compared with FIG. 1 A.
- the direction of a slit 107 b is also varied by 90 degrees accordingly.
- the radio frequency signal is generated in the signal source 106 , and a radio frequency current 119 flows on the outer surface of metal casings 101 a , 101 b through current feeding terminals 103 , current feeding and mounting screws 104 , and screw holes 105 of metal casings.
- the metal casings 101 a , 101 b are designed to resonate at the frequency being used when a radio frequency current flows on the casing outer surface of which size is, for example, 3 ⁇ /4 in width, 3 ⁇ /4 in depth, and ⁇ /4 in height as shown in FIG. 3 .
- the behavior of radio frequency current 119 flowing on the outer surface of the metal casing 101 a composed as shown in FIG. 1A is shown in FIG. 3 A.
- the radio frequency current 119 resonates on the surface of the metal casing 101 a , and generates a resonance current 120 on the casing outer surface as indicated by the arrow in the diagram and also shown in FIG. 2 .
- one arrow represents a half wavelength of current on the casing, and the total of the casing outer circumference is two wavelengths. Thus it shows that the resonance current is flowing uniformly on the entire circumference of the casing.
- the radio frequency current 119 flowing on the casing outer surface and the resonance current 120 generated by the casing resonance are coupled with the space and hence radiate radio waves, so that the casing functions as an antenna.
- the casing size is designed to resonate at the frequency being used. Therefore, as shown in FIG. 4, even if current is supplied from a position 122 on the casing, as the resonance current by resonance, a resonance current 124 closer to the current feeding position and a resonance current 123 remoter from the current feeding position are equal in magnitude. Accordingly the radiation directivity characteristic as the antenna is equal on both sides although the current feeding position is deviated to one side as shown in the diagram.
- FIG. 1C shows a combination of configuration in FIG. 1 A and configuration in FIG. 1B, in which a first signal source 106 a and a second signal source 106 b are mounted on a radio frequency module 102 c . These two signal sources 106 a , 106 b are connected as shown in the diagram to three current feeding terminals 103 provided corresponding to three screw holes 105 disposed across each branch of a cross slit 107 c.
- the radio frequency current can be generated individually as shown in FIG. 3A or FIG. 3 B. Therefore, by changing over the planes of polarization of radio waves, radio waves can be generated in different modes (for example, different directions, or different polarizations such as vertical polarization, horizontal polarization, oblique polarization, right elliptical polarization or left elliptical polarization). Consequently the polarization and directivity characteristic bringing about a strong reception power for the destination of communication can be selected. In this case of changeover, only one signal source may be used, instead of two signal sources, and its connection to the current feeding terminals 103 can be changed over.
- the output can be divided into two by a radio frequency switch, so that it can be used in the same way as two signal sources. It therefore realizes a wireless information consumer electronics apparatus less limited in places for the apparatus to be installed.
- the metal casing is in a shape to resonate at the frequency being used.
- the radio frequency module is mounted on the outer surface of the metal casing, so that a radio frequency current may be supplied to the casing outer surface through the module mounting screws.
- a radio frequency current can be supplied on the metal casing outer surface.
- the resonance of the metal casing it can be used as an antenna having a favorable radiation characteristic at the opposite side of the current feeding position as well as at the same side. Since an independent component as antenna is not used, it realizes a wireless information consumer electronics apparatus free from limitation of antenna mounting position.
- radio waves are generated from the signal source.
- the metal casing as antenna also resonates by the radio wave transmitted from other devices because of reciprocity theorem, so that the radio wave is also received favorably.
- the current feeding terminals in the invention are defined to be terminals which supply radio wave current to the outside, and terminals which supply radio frequency current also from the outside to the inside.
- the radio frequency module includes both a device which generates radio frequency signals, and a device which receives radio frequency signals.
- FIG. 5 is a perspective view showing a wireless information consumer electronics apparatus 100 d such as a set-top box in embodiment 2 of the invention. What differs from FIG. 1C in embodiment 1 is the connection direction of signal sources 106 a , 106 b to the current feeding terminals 103 of a radio frequency module 102 d . They are connected in diagonal directions to each one of four screw holes 105 around the cross slit 107 c.
- the radio frequency module since the radio frequency module is mounted on the metal casing, it may be uneasy for another casing or other objects to be stacked up directly. To avoid this, by forming a recess including the radio wave module mounting positions and their peripheral portions of the metal casing, the radio wave module can be mounted in the recess. Moreover, when the upper surface of the radio frequency module is covered with nonconductive material such as plastic material, the radio frequency module can be protected, and invasion of dust can be prevented at the same time.
- FIG. 6 is a perspective view showing a wireless information consumer electronics apparatus 10 e such as set-top box in embodiment 3 of the invention.
- FIG. 7 is a sectional view showing flow of radio frequency current on the casing outer surface.
- the apparatus 10 e has a card-shaped radio frequency module 102 e inserted in a side slot 108 of a metal casing 101 e , and is connected to the connector.
- the radio frequency module 102 e three grounding wires 109 are provided in the radio frequency module 102 e .
- a first signal source 111 a and a second signal source 111 b are connected in alternating current to the three grounding wires 109 by way of a capacitor 110 .
- the grounding wires 109 are connected in direct current to radio frequency current lead-out notches 112 a to 112 c for leading out radio frequency current to the metal casing outer surface either directly or by way of a connector or the like.
- the first signal source 111 a is connected to the radio frequency current lead-out notch 112 a through the capacitor 110 and grounding wire 109 .
- the second signal source 111 b is connected to the radio frequency current lead-out notch 112 b through the capacitor 110 and grounding wire 109 .
- the common output of the two signal sources is connected to the radio frequency current lead-out notch 112 c through the capacitor 110 and grounding wire 109 .
- the radio frequency signal when radiating a radio frequency signal as an electromagnetic wave, the radio frequency signal is generated in the first signal source 111 a and second signal source 111 b on the card-shaped radio frequency module 102 e .
- the generated radio frequency signal flows out as a current to the outer surface of the metal casing 101 e through the grounding wires 109 connected in direct current to the metal casing and the radio frequency current lead-out notches 112 a to 112 c .
- the card-shaped radio frequency module 102 e is inserted into the wireless information consumer electronics apparatus.
- FIG. 7 shows the mode of flow of radio frequency current on the casing outer surface.
- the radio frequency signal generated in the first and second signal sources 111 a , 111 b flows as radio frequency current 119 on the outer surface of the metal casing 101 e .
- the radio frequency current 119 flows through the grounding wires 109 connected in direct current to the metal casing and the radio frequency current lead-out notches 112 a to 112 c.
- the radio frequency current lead-out notches 112 a and 112 c the radio frequency current as shown in FIG. 3A flows in the metal casing.
- the radio frequency current lead-out notches 112 b and 112 c the radio frequency current as shown in FIG. 3B flows in the metal casing.
- the opening may be covered with a lid of nonconductive material such as plastic material.
- FIG. 8 is a perspective view showing a wireless information consumer electronics apparatus 100 f such as a set-top box in embodiment 4 of the invention.
- FIG. 9 is a sectional view showing flow of radio frequency current on the casing outer surface.
- the apparatus 100 f has a card-shaped radio frequency module 102 f inserted in the side of a metal casing 10 if, and is connected to the connector or the like.
- An excitation patch 113 is mounted on the radio frequency module 102 f , and a first signal source 114 and a second signal source 115 are connected to the excitation patch 113 .
- the metal casing 101 f includes a lead-out window 118 for leading out the radio frequency current to the outer surface of the metal casing.
- the radio frequency signal when radiating a radio frequency signal as an electromagnetic wave, the radio frequency signal is generated in the first signal source 114 and second signal source 115 on the card-shaped radio frequency module 102 f .
- the generated radio frequency signal causes to generate a first resonance mode current 116 and a second resonance mode current 117 which cross orthogonally on the excitation patch 113 .
- a radio frequency current flows to the outer surface of the metal casing, as the excitation patch 113 on the card-shaped radio frequency module 102 f and the metal casing 101 f are electromagnetically coupled. Then the card-shaped radio frequency module 102 f is inserted into the apparatus 100 f .
- the flowing radio frequency current flows out to the casing outer surface through the radio frequency current lead-out window 118 .
- FIG. 9 shows the mode of flow of radio frequency current on the casing outer surface.
- the radio frequency signal generated in the first and second signal sources 114 , 115 is applied at right angle into the excitation patch 113 having plural resonance modes.
- a radiation 121 from the excitation patch 113 electromagnetically coupled to the metal casing 101 f passes through the radio frequency current lead-out window 118 in plural excitation modes.
- a radio frequency current 119 flows on the outer surface of the metal casing 101 .
- the metal casing 101 f is designed, so as to resonate at the frequency being used when the radio frequency current flows on the casing outer surface, in the size of, for example, 3 ⁇ /4 in width, 3 ⁇ /4 in depth, and ⁇ /4 in height as shown in FIG. 3 .
- the radio frequency current 119 flowing on the outer surface of the metal casing 101 f having such a structure resonates on the casing surface.
- the current 119 generates a resonance current 120 on the casing outer surface shown in FIG. 9, in the same manner as indicated by arrow in FIG. 3 .
- one arrow represents a half wavelength of current on the casing, and the total of the casing outer circumference is two wavelengths, and it shows that the resonance current is flowing uniformly on the entire circumference of the casing.
- the radio frequency current 119 flowing on the casing outer surface and the resonance current 120 generated by the casing resonance are coupled with the space and hence radiate radio waves, so that the casing functions as an antenna.
- the opening may be covered with a lid of nonconductive material such as plastic material.
- radio frequency current lead-out notches and radio frequency current lead-out window to the metal casing may be properly changed.
- a resonance state may be established by passing radio frequency current in the diagonal direction of the metal casing as shown in embodiment 2.
- the radio frequency module is a card that can be inserted into the metal casing and pulled out from that, but the radio frequency module may be also fixed in the metal casing.
- the metal casing is shaped so as to resonate, and an independent component as antenna is not used, so that a wireless information consumer electronics apparatus not limited in the mounting position of antenna is realized.
- the polarization and directivity characteristic can be changed over as shown in FIGS. 3A, B. This is in the same manner when changed over so as to operate either the first signal source 106 a , 111 a , 114 , or the second signal source 106 b , 111 b , 115 .
- the polarization and directivity characteristic being strong in the reception power can be selected. Accordingly a wireless information consumer electronics apparatus less limited in the place of installation of the apparatus is realized.
- the following configuration is employed. i) The metal casing is shaped so as to resonate at the frequency being used ii) a radio frequency module is put on the outer surface of the metal casing, and iii) a radio frequency current is supplied to the casing outer surface through the module mounting screws.
- a radio frequency current can be supplied to the outer surface of the metal casing, and by the resonance of the casing, it can be used as an antenna having uniform and excellent radiation characteristic regardless of the current feeding position on the casing. Since an independent component as antenna is not used, a wireless information consumer electronics apparatus not limited in the mounting position of antenna is realized.
- This effect is also realized by shaping the metal casing so as to resonate at the frequency being used, placing a radio frequency module in the casing, and feeding radio frequency current to the casing through the grounding wire connected in direct current to the casing.
- the same effect is realized by shaping the metal casing so as to resonate at the frequency being used, placing a radio frequency module in the casing, and feeding radio frequency current to the casing through the excitation patch electromagnetically connected to the casing.
- the metal casing in the structure of using metal casing as antenna, is shaped so as to resonate in plural modes at the frequency being used, and a radio frequency current can be supplied to the casing in plural excitation modes so that the casing may operate in polarization and directivity diversity action.
- Selecting two or more grounding wires out of at least three or more grounding wires can generate the plural excitation modes.
- the plural excitation modes can be generated by using plural resonance modes of the excitation patch, and electromagnetic waves of different polarizations and electromagnetic waves of different directivity characteristics can be generated from the metal casing.
- the polarization and directivity characteristic being strong in the reception power can be selected, so that a wireless information consumer electronics apparatus less limited in the place of installation of the apparatus is realized.
- FIG. 10 is a block diagram of a wireless information consumer electronics apparatus in embodiment 5 of the invention
- FIG. 11 is a diagram showing a matching method of the wireless information consumer electronics apparatus in embodiment 5 of the invention
- FIGS. 12A, B are circuit diagrams showing configuration of matching element of the wireless information consumer electronics apparatus in embodiment 5 of the invention
- FIG. 12C is a diagram showing reactance characteristic of matching element of the wireless information consumer electronics apparatus in embodiment 5 of the invention.
- This embodiment is applied in a wireless information consumer electronics apparatus using metal casing as antenna as shown in embodiments 1 to 4.
- a metal casing antenna 201 operating on the first polarization and directivity, and a metal casing antenna 202 operating on the second polarization and directivity are selectively changed over by an antenna switch 203 , and connected to a matching circuit 204 .
- the matching circuit 204 is also called as an antenna automatic matching device in the claims for matching the antenna by varying the impedance of the antenna matching element automatically by a detection signal of antenna matching state.
- a matching state monitoring circuit 205 is, as described in the claims, for automatically detecting the presence or absence of metal in the surroundings or metal approaching state by monitoring the matching state of the antenna in the structure of using metal casing as antenna.
- a transmission-reception changeover switch 206 selectively changes over whether to connect a transmission signal from a transmission circuit 207 to the antenna side circuit, or to connect a reception signal from the antenna side circuit to a reception circuit 208 .
- a CPU 209 controls the operation of this wireless information consumer electronics apparatus.
- the wireless information consumer electronics apparatus 200 detects the matching state of the antenna by the matching state monitoring circuit 205 , for example, in a pause of transmission timing of data packet.
- the detection for example, a directivity coupler and a detecting element are used, and transmission power toward the matching circuit 204 and reflection power reflected from the matching circuit 204 are detected, and digitized and sent into the CPU 209 .
- the reflection amount and transmission loss of input and output terminals of the antenna switch 203 , matching state monitoring circuit 205 , and transmission-reception changeover switch 206 are designed sufficiently small. Then the reflection power reflected from the matching circuit 204 is determined by the relation between the combined impedance of the antenna 201 or 202 and matching circuit 204 and the output impedance of the transmission circuit 207 .
- the matching state data detected by the matching state monitoring circuit 205 is sent into the CPU 209 .
- the CPU sends the matching data into the matching circuit 204 for matching.
- a control voltage for matching is generated in the matching circuit 204 .
- FIG. 11 shows an antenna matching method.
- antenna impedance Zant is matched with impedance Zin of transmission circuit 207 side, for example, at parallel admittance (a reciprocal number of impedance) jY and series impedance jZ.
- the mode of impedance matching at Jy and jZ is shown on the immittance chart.
- FIG. 12A and B show the composition of matching element.
- FIG. 12C shows the reactance characteristic of the matching element.
- This varactor diode 211 is a varactor diode for composing the automatic matching device or automatic matching element, as also mentioned in the claims.
- ferrodielectric capacitor 212 is a ferrodielectric capacitor for also composing the automatic matching device mentioned in the claims.
- the impedance Z and admittance Y between the matching element terminals vary in a range from capacitive state to inductive state as shown in FIG. 12C by the control voltage 215 indicated by VT. Therefore by connecting this matching element to the antenna as parallel admittance and series impedance shown in FIG. 11, antenna matching is realized.
- the antenna matching state varies significantly depending on the presence or absence of metal around the antenna or metal approaching state.
- presence or absence of metal around the antenna or metal approaching state can be automatically detected.
- the presence of metal around the antenna or metal approaching may vary the antenna impedance and impair the radiation performance.
- the metal casing of each set-top box acts to worsen the antenna radiation characteristic of other set-top boxes. Consequently the communication area is limited or the communication distance is shortened.
- the worsened radiation performance may be recovered. As a result, limitation of place of installation of the apparatus is alleviated, and even in a stack-up installation of apparatuses, a wireless information consumer electronics apparatus not worsened in the antenna sensitivity is realized.
- the metal casing Even if the metal casing inevitably cannot be shaped so as to resonate at the frequency being used, by automatically matching the antenna, the antenna efficiency is enhanced. In other words, even if the metal casing is not preliminarily designed to resonate at the frequency being used, only by installing a radio frequency module at an arbitrary place, a wireless information consumer electronics apparatus having an efficient antenna may be realized.
- the following constitution is employed to use the metal casing as an antenna.
- the metal casing is in a shape to resonate at the frequency being used
- the radio frequency module is mounted on the casing outer surface, so that a radio frequency current may be supplied to the casing outer surface through the module mounting screws.
- the metal casing in the structure of using metal casing as antenna, is shaped so as to resonate in plural modes at the frequency being used. Then a radio frequency current can be supplied to the casing in plural excitation modes so that the casing may operate in polarization and directivity diversity action.
- a wireless information consumer electronics apparatus less limited in a place of installation of the apparatus is realized.
- the plural excitation modes can be generated by selecting two or more grounding wires out of at least three or more grounding wires. Then the same effects are obtained.
- the plural excitation modes can be generated by using plural resonance modes of the excitation patch. Then, the same effects are obtained as well.
- the wireless information consumer electronics apparatus of the invention having the structure of using metal casing as antenna, by monitoring the matching state of the antenna, presence or absence of metal around the apparatus or metal approaching state can be detected automatically.
- the antenna is matched by varying the impedance of the antenna matching element automatically by this detection signal.
- the metal casing Even if the metal casing inevitably cannot be shaped so as to resonate at the frequency being used, by matching the antenna automatically, the antenna efficiency can be enhanced. In other words, if the metal casing is not designed preliminarily in a shape to resonate at the frequency being used, only by mounting a radio frequency module at an arbitrary place, a wireless information consumer electronics apparatus having an efficient antenna is realized. This is the greatest merit of the invention.
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Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2000-056809 | 2000-03-02 | ||
JP2000056809A JP2001244717A (ja) | 2000-03-02 | 2000-03-02 | 無線情報家電装置 |
PCT/JP2001/001493 WO2001065633A2 (en) | 2000-03-02 | 2001-02-28 | Wireless information consumer electronics apparatus |
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US20030146875A1 US20030146875A1 (en) | 2003-08-07 |
US6798385B2 true US6798385B2 (en) | 2004-09-28 |
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US10/220,414 Expired - Fee Related US6798385B2 (en) | 2000-03-02 | 2001-02-28 | Wireless information consumer electronic apparatus |
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US (1) | US6798385B2 (zh) |
JP (1) | JP2001244717A (zh) |
KR (1) | KR20020080464A (zh) |
CN (1) | CN1208870C (zh) |
TW (1) | TW483189B (zh) |
WO (1) | WO2001065633A2 (zh) |
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GB0127566D0 (en) * | 2001-11-19 | 2002-01-09 | Psion Digital Ltd | Antenna for a portable radio device |
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JP2009223620A (ja) * | 2008-03-17 | 2009-10-01 | Denso Corp | 力学量センサの組み付け構造 |
JP5234139B2 (ja) | 2010-05-20 | 2013-07-10 | 株式会社日本自動車部品総合研究所 | 無線通信装置 |
CN103579754B (zh) * | 2012-07-24 | 2016-12-21 | 联想(北京)有限公司 | 天线和用于形成天线的方法 |
KR20150029172A (ko) * | 2013-09-09 | 2015-03-18 | 삼성전자주식회사 | 안테나유닛을 구비한 신호중계장치 |
KR20160049646A (ko) * | 2014-10-28 | 2016-05-10 | 삼성전자주식회사 | 분리형 카드부를 구비한 셋톱박스와 디스플레이장치, 및 그 카드부 장착방법 |
CN113937901A (zh) | 2016-08-26 | 2022-01-14 | 纽卡润特有限公司 | 无线连接器系统 |
GB2567812A (en) * | 2017-10-19 | 2019-05-01 | Raspberry Pi Trading Ltd | Radio module |
CN109755730A (zh) * | 2019-01-08 | 2019-05-14 | 成都频岢微电子有限公司 | 一种基于超材料的高性能小型化圆极天线 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0955679A (ja) | 1995-08-10 | 1997-02-25 | Masayuki Makita | 腕時計型の無線電話装置 |
EP0929121A1 (en) | 1998-01-09 | 1999-07-14 | Nokia Mobile Phones Ltd. | Antenna for mobile communcations device |
FR2779022A1 (fr) | 1998-05-20 | 1999-11-26 | Nortel Matra Cellular | Station de base de radiocommunication |
US6046700A (en) * | 1996-08-01 | 2000-04-04 | Nortel Networks Corporation | Antenna arrangement |
US6456242B1 (en) * | 2001-03-05 | 2002-09-24 | Magis Networks, Inc. | Conformal box antenna |
US20030028902A1 (en) * | 2001-07-11 | 2003-02-06 | Cubley H. Dean | Set-top box having an improved patch antenna |
-
2000
- 2000-03-02 JP JP2000056809A patent/JP2001244717A/ja active Pending
-
2001
- 2001-02-28 KR KR1020027011520A patent/KR20020080464A/ko not_active Application Discontinuation
- 2001-02-28 CN CNB018059503A patent/CN1208870C/zh not_active Expired - Fee Related
- 2001-02-28 US US10/220,414 patent/US6798385B2/en not_active Expired - Fee Related
- 2001-02-28 WO PCT/JP2001/001493 patent/WO2001065633A2/en not_active Application Discontinuation
- 2001-03-01 TW TW090104745A patent/TW483189B/zh not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0955679A (ja) | 1995-08-10 | 1997-02-25 | Masayuki Makita | 腕時計型の無線電話装置 |
US6046700A (en) * | 1996-08-01 | 2000-04-04 | Nortel Networks Corporation | Antenna arrangement |
EP0929121A1 (en) | 1998-01-09 | 1999-07-14 | Nokia Mobile Phones Ltd. | Antenna for mobile communcations device |
FR2779022A1 (fr) | 1998-05-20 | 1999-11-26 | Nortel Matra Cellular | Station de base de radiocommunication |
EP1078418A1 (fr) | 1998-05-20 | 2001-02-28 | Nortel Matra Cellular | Antenne pour station de base de radiocomunication |
US6456242B1 (en) * | 2001-03-05 | 2002-09-24 | Magis Networks, Inc. | Conformal box antenna |
US20030028902A1 (en) * | 2001-07-11 | 2003-02-06 | Cubley H. Dean | Set-top box having an improved patch antenna |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130134228A1 (en) * | 2006-04-26 | 2013-05-30 | Murata Manufacturing Co., Ltd. | Electromagnetic-coupling-module-attached article |
US9165239B2 (en) * | 2006-04-26 | 2015-10-20 | Murata Manufacturing Co., Ltd. | Electromagnetic-coupling-module-attached article |
US9774091B2 (en) | 2012-03-20 | 2017-09-26 | Thomson Licensing Dtv | Dielectric slot antenna using capacitive coupling |
US9825662B2 (en) | 2014-04-25 | 2017-11-21 | International Electronics Machines Corporation | Wireless transmission through faraday cage enclosure |
US10333200B2 (en) | 2015-02-17 | 2019-06-25 | Samsung Electronics Co., Ltd. | Portable device and near field communication chip |
US10700422B2 (en) | 2015-02-17 | 2020-06-30 | Samsung Electronics Co., Ltd. | Portable device and near field communication chip |
WO2020052885A1 (de) * | 2018-09-13 | 2020-03-19 | Endress+Hauser SE+Co. KG | Vorrichtung zur übertragung von signalen aus einem zumindest teilweise metallischen gehäuse |
US20220037760A1 (en) * | 2018-09-13 | 2022-02-03 | Endress+Hauser SE+Co. KG | Apparatus for transferring signals from an at least partially metallic housing |
Also Published As
Publication number | Publication date |
---|---|
CN1408131A (zh) | 2003-04-02 |
WO2001065633A3 (en) | 2002-02-07 |
TW483189B (en) | 2002-04-11 |
JP2001244717A (ja) | 2001-09-07 |
CN1208870C (zh) | 2005-06-29 |
KR20020080464A (ko) | 2002-10-23 |
US20030146875A1 (en) | 2003-08-07 |
WO2001065633A2 (en) | 2001-09-07 |
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